class TestRedisMonitor(TestCase):
def setUp(self):
self.redis_monitor = RedisMonitor("settings.py", True)
self.redis_monitor.settings = self.redis_monitor.wrapper.load("settings.py")
self.redis_monitor.logger = MagicMock()
def test_load_plugins(self):
# test loading default plugins
assert_keys = [100, 200, 300, 400]
self.redis_monitor._load_plugins()
self.assertEqual(self.redis_monitor.plugins_dict.keys(), assert_keys)
# test removing a plugin from settings
assert_keys = [100, 300, 400]
self.redis_monitor.settings["PLUGINS"]["plugins.stop_monitor.StopMonitor"] = None
self.redis_monitor._load_plugins()
self.assertEqual(self.redis_monitor.plugins_dict.keys(), assert_keys)
self.redis_monitor.settings["PLUGINS"]["plugins.stop_monitor.StopMonitor"] = 200
# fail if the class is not found
self.redis_monitor.settings["PLUGINS"]["plugins.crazy_class.CrazyHandler"] = (400,)
self.assertRaises(ImportError, self.redis_monitor._load_plugins)
del self.redis_monitor.settings["PLUGINS"]["plugins.crazy_class.CrazyHandler"]
self.redis_monitor.settings["PLUGINS"] = {}
def test_active_plugins(self):
# test that exceptions are caught within each plugin
# assuming now all plugins are loaded
self.redis_monitor._load_plugins()
self.redis_monitor.stats_dict = {}
# BaseExceptions are never raised normally
self.redis_monitor.plugins_dict.items()[0][1]["instance"].handle = MagicMock(side_effect=BaseException("info"))
self.redis_monitor.plugins_dict.items()[1][1]["instance"].handle = MagicMock(side_effect=BaseException("stop"))
self.redis_monitor.plugins_dict.items()[2][1]["instance"].handle = MagicMock(
side_effect=BaseException("expire")
)
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.scan_iter = MagicMock()
# lets just assume the regex worked
self.redis_monitor.redis_conn.scan_iter.return_value = ["somekey1"]
# info
try:
plugin = self.redis_monitor.plugins_dict.items()[0][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Info not called")
except BaseException as e:
self.assertEquals("info", e.message)
# action
try:
plugin = self.redis_monitor.plugins_dict.items()[1][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Stop not called")
except BaseException as e:
self.assertEquals("stop", e.message)
# expire
try:
plugin = self.redis_monitor.plugins_dict.items()[2][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Expire not called")
except BaseException as e:
self.assertEquals("expire", e.message)
# test that an exception within a handle method is caught
try:
self.redis_monitor.plugins_dict.items()[0][1]["instance"].handle = MagicMock(
side_effect=Exception("normal")
)
plugin = self.redis_monitor.plugins_dict.items()[0][1]
self.redis_monitor._process_plugin(plugin)
except Exception as e:
self.fail("Normal Exception not handled")
def test_load_stats_plugins(self):
# lets assume we are loading the default plugins
self.redis_monitor._load_plugins()
self.redis_monitor.redis_conn = MagicMock()
# test no rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings["STATS_TIMES"] = []
self.redis_monitor._setup_stats_plugins()
defaults = ["ExpireMonitor", "StopMonitor", "InfoMonitor", "StatsMonitor"]
self.assertEquals(sorted(self.redis_monitor.stats_dict["plugins"].keys()), sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key]["instance"].__class__.__name__
self.assertEquals(self.redis_monitor.stats_dict["plugins"][plugin_name].keys(), ["lifetime"])
# test good/bad rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings["STATS_TIMES"] = ["SECONDS_15_MINUTE", "SECONDS_1_HOUR", "SECONDS_DUMB"]
good = ["lifetime", 900, 3600] # for totals, not DUMB
self.redis_monitor._setup_stats_plugins()
self.assertEquals(sorted(self.redis_monitor.stats_dict["plugins"].keys()), sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key]["instance"].__class__.__name__
self.assertEquals(sorted(self.redis_monitor.stats_dict["plugins"][plugin_name].keys()), sorted(good))
for plugin_key in self.redis_monitor.stats_dict["plugins"]:
k1 = "stats:redis-monitor:{p}".format(p=plugin_key)
for time_key in self.redis_monitor.stats_dict["plugins"][plugin_key]:
if time_key == 0:
self.assertEquals(
self.redis_monitor.stats_dict["plugins"][plugin_key][0].key, "{k}:lifetime".format(k=k1)
)
else:
self.assertEquals(
self.redis_monitor.stats_dict["plugins"][plugin_key][time_key].key,
"{k}:{t}".format(k=k1, t=time_key),
)
def test_main_loop(self):
self.redis_monitor._load_plugins()
self.redis_monitor._process_plugin = MagicMock(side_effect=Exception("normal"))
try:
self.redis_monitor._main_loop()
self.fail("_process_plugin not called")
except BaseException as e:
self.assertEquals("normal", e.message)
def test_precondition(self):
self.redis_monitor.stats_dict = {}
instance = MagicMock()
instance.check_precondition = MagicMock(return_value=False)
instance.handle = MagicMock(side_effect=Exception("handler"))
key = "stuff"
value = "blah"
# this should not raise an exception
self.redis_monitor._process_key_val(instance, key, value)
# this should
instance.check_precondition = MagicMock(return_value=True)
try:
self.redis_monitor._process_key_val(instance, key, value)
self.fail("handler not called")
except BaseException as e:
self.assertEquals("handler", e.message)
class TestRedisMonitor(TestCase):
def setUp(self):
self.redis_monitor = RedisMonitor("settings.py", True)
self.redis_monitor.settings = self.redis_monitor.wrapper.load("settings.py")
self.redis_monitor.logger = MagicMock()
def test_load_plugins(self):
# test loading default plugins
assert_keys = [100, 200, 300, 400, 500]
self.redis_monitor._load_plugins()
self.assertEqual(list(self.redis_monitor.plugins_dict.keys()), assert_keys)
# test removing a plugin from settings
assert_keys = [100, 300, 400, 500]
self.redis_monitor.settings['PLUGINS'] \
['plugins.stop_monitor.StopMonitor'] = None
self.redis_monitor._load_plugins()
self.assertEqual(list(self.redis_monitor.plugins_dict.keys()), assert_keys)
self.redis_monitor.settings['PLUGINS'] \
['plugins.stop_monitor.StopMonitor'] = 200
# fail if the class is not found
self.redis_monitor.settings['PLUGINS'] \
['plugins.crazy_class.CrazyHandler'] = 400,
self.assertRaises(ImportError, self.redis_monitor._load_plugins)
del self.redis_monitor.settings['PLUGINS'] \
['plugins.crazy_class.CrazyHandler']
self.redis_monitor.settings['PLUGINS'] = {}
def test_active_plugins(self):
# test that exceptions are caught within each plugin
# assuming now all plugins are loaded
self.redis_monitor._load_plugins()
self.redis_monitor.stats_dict = {}
# BaseExceptions are never raised normally
list(self.redis_monitor.plugins_dict.items())[0][1]['instance'].handle = MagicMock(side_effect=BaseException("info"))
list(self.redis_monitor.plugins_dict.items())[1][1]['instance'].handle = MagicMock(side_effect=BaseException("stop"))
list(self.redis_monitor.plugins_dict.items())[2][1]['instance'].handle = MagicMock(side_effect=BaseException("expire"))
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.scan_iter = MagicMock()
self.redis_monitor._create_lock_object = MagicMock()
# lets just assume the regex worked
self.redis_monitor.redis_conn.scan_iter.return_value = ['somekey1']
# info
try:
plugin = list(self.redis_monitor.plugins_dict.items())[0][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Info not called")
except BaseException as e:
self.assertEquals("info", str(e))
# action
try:
plugin = list(self.redis_monitor.plugins_dict.items())[1][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Stop not called")
except BaseException as e:
self.assertEquals("stop", str(e))
# expire
try:
plugin = list(self.redis_monitor.plugins_dict.items())[2][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Expire not called")
except BaseException as e:
self.assertEquals("expire", str(e))
# test that an exception within a handle method is caught
self.redis_monitor._process_failures = MagicMock()
self.redis_monitor._increment_fail_stat = MagicMock()
try:
list(self.redis_monitor.plugins_dict.items())[0][1]['instance'].handle = MagicMock(side_effect=Exception("normal"))
plugin = list(self.redis_monitor.plugins_dict.items())[0][1]
self.redis_monitor._process_plugin(plugin)
except Exception as e:
self.fail("Normal Exception not handled")
self.assertTrue(self.redis_monitor._increment_fail_stat.called)
self.assertTrue(self.redis_monitor._process_failures.called)
def test_locking_actions(self):
# tests for _process_plugins with locking
self.redis_monitor._load_plugins()
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.scan_iter = MagicMock()
self.redis_monitor.redis_conn.get = MagicMock(return_value=5)
lock = MagicMock()
lock.acquire
lock.acquire = MagicMock(return_value=False)
lock.release = MagicMock()
lock._held = False
self.redis_monitor._create_lock_object = MagicMock(return_value=lock)
self.redis_monitor._increment_fail_stat = MagicMock()
self.redis_monitor._process_failures = MagicMock()
self.redis_monitor._process_key_val = MagicMock()
# lets just assume the regex worked
self.redis_monitor.redis_conn.scan_iter.return_value = ['somekey1']
plugin = {'instance': 'test',
'regex': 'abc123'}
# test didnt acquire lock
self.redis_monitor._process_key_val.assert_not_called()
self.redis_monitor._process_plugin(plugin)
self.redis_monitor._process_key_val.assert_not_called()
lock.release.assert_not_called()
# test got lock
lock.acquire = MagicMock(return_value=True)
lock._held = True
self.redis_monitor._process_plugin(plugin)
self.redis_monitor._process_key_val.assert_called_once_with('test', 'somekey1', 5)
# test lock released
lock.release.assert_called_once_with()
# test lock not held not released
lock._held = False
lock.release.reset_mock()
self.redis_monitor._process_plugin(plugin)
lock.release.assert_not_called()
def test_load_stats_plugins(self):
# lets assume we are loading the default plugins
self.redis_monitor._load_plugins()
self.redis_monitor.redis_conn = MagicMock()
# test no rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings['STATS_TIMES'] = []
self.redis_monitor._setup_stats_plugins()
defaults = [
'ExpireMonitor',
'StopMonitor',
'InfoMonitor',
'StatsMonitor',
'ZookeeperMonitor'
]
self.assertEquals(
sorted(self.redis_monitor.stats_dict['plugins'].keys()),
sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key]['instance'].__class__.__name__
self.assertEquals(
list(self.redis_monitor.stats_dict['plugins'][plugin_name].keys()),
['lifetime'])
# test good/bad rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings['STATS_TIMES'] = [
'SECONDS_15_MINUTE',
'SECONDS_1_HOUR',
'SECONDS_DUMB',
]
good = [
'lifetime', # for totals, not DUMB
'900',
'3600',
]
self.redis_monitor._setup_stats_plugins()
self.assertEquals(
sorted(self.redis_monitor.stats_dict['plugins'].keys()),
sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key]['instance'].__class__.__name__
self.assertEquals(
sorted([str(x) for x in self.redis_monitor.stats_dict['plugins'][plugin_name].keys()]),
sorted(good))
for plugin_key in self.redis_monitor.stats_dict['plugins']:
k1 = 'stats:redis-monitor:{p}'.format(p=plugin_key)
for time_key in self.redis_monitor.stats_dict['plugins'][plugin_key]:
if time_key == 0:
self.assertEquals(
self.redis_monitor.stats_dict['plugins'][plugin_key][0].key,
'{k}:lifetime'.format(k=k1)
)
else:
self.assertEquals(
self.redis_monitor.stats_dict['plugins'][plugin_key][time_key].key,
'{k}:{t}'.format(k=k1, t=time_key)
)
def test_main_loop(self):
self.redis_monitor._load_plugins()
self.redis_monitor._process_plugin = MagicMock(side_effect=Exception(
"normal"))
try:
self.redis_monitor._main_loop()
self.fail("_process_plugin not called")
except BaseException as e:
self.assertEquals("normal", str(e))
def test_precondition(self):
self.redis_monitor.stats_dict = {}
instance = MagicMock()
instance.check_precondition = MagicMock(return_value=False)
instance.handle = MagicMock(side_effect=Exception("handler"))
key = 'stuff'
value = 'blah'
# this should not raise an exception
self.redis_monitor._process_key_val(instance, key, value)
# this should
instance.check_precondition = MagicMock(return_value=True)
try:
self.redis_monitor._process_key_val(instance, key, value)
self.fail('handler not called')
except BaseException as e:
self.assertEquals('handler', str(e))
def test_get_fail_key(self):
key = 'test'
result = 'lock:test:failures'
self.assertEquals(self.redis_monitor._get_fail_key(key), result)
def test_process_failures(self):
self.redis_monitor.settings = {'RETRY_FAILURES':True,
'RETRY_FAILURES_MAX': 3}
self.redis_monitor._get_fail_key = MagicMock(return_value='the_key')
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.set = MagicMock()
# test not set
self.redis_monitor.redis_conn.get = MagicMock(return_value=None)
self.redis_monitor._process_failures('key1')
self.redis_monitor.redis_conn.set.assert_called_once_with('the_key', 1)
# test set
self.redis_monitor.redis_conn.set.reset_mock()
self.redis_monitor.redis_conn.get = MagicMock(return_value=2)
self.redis_monitor._process_failures('key1')
self.redis_monitor.redis_conn.set.assert_called_once_with('the_key', 3)
# test exceeded
self.redis_monitor.redis_conn.delete = MagicMock()
self.redis_monitor.redis_conn.set.reset_mock()
self.redis_monitor.redis_conn.get = MagicMock(return_value=3)
self.redis_monitor._process_failures('key1')
calls = [call('the_key'), call('key1')]
self.redis_monitor.redis_conn.delete.assert_has_calls(calls)
@mock.patch('socket.gethostname', return_value='host')
@mock.patch('time.time', return_value=5)
def test_report_self(self, h, t):
self.redis_monitor.my_uuid = '1234'
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.set = MagicMock()
self.redis_monitor.redis_conn.expire = MagicMock()
self.redis_monitor._report_self()
self.redis_monitor.redis_conn.set.assert_called_once_with('stats:redis-monitor:self:host:1234', 5)
self.redis_monitor.redis_conn.expire.assert_called_once_with('stats:redis-monitor:self:host:1234', 120)
class TestRedisMonitor(TestCase):
def setUp(self):
self.redis_monitor = RedisMonitor("settings.py", True)
self.redis_monitor.settings = self.redis_monitor.wrapper.load(
"settings.py")
self.redis_monitor.logger = MagicMock()
def test_load_plugins(self):
# test loading default plugins
assert_keys = [100, 200, 300, 400, 500]
self.redis_monitor._load_plugins()
self.assertEqual(list(self.redis_monitor.plugins_dict.keys()),
assert_keys)
# test removing a plugin from settings
assert_keys = [100, 300, 400, 500]
self.redis_monitor.settings['PLUGINS'] \
['plugins.stop_monitor.StopMonitor'] = None
self.redis_monitor._load_plugins()
self.assertEqual(list(self.redis_monitor.plugins_dict.keys()),
assert_keys)
self.redis_monitor.settings['PLUGINS'] \
['plugins.stop_monitor.StopMonitor'] = 200
# fail if the class is not found
self.redis_monitor.settings['PLUGINS'] \
['plugins.crazy_class.CrazyHandler'] = 400,
self.assertRaises(ImportError, self.redis_monitor._load_plugins)
del self.redis_monitor.settings['PLUGINS'] \
['plugins.crazy_class.CrazyHandler']
self.redis_monitor.settings['PLUGINS'] = {}
def test_active_plugins(self):
# test that exceptions are caught within each plugin
# assuming now all plugins are loaded
self.redis_monitor._load_plugins()
self.redis_monitor.stats_dict = {}
# BaseExceptions are never raised normally
list(self.redis_monitor.plugins_dict.items()
)[0][1]['instance'].handle = MagicMock(
side_effect=BaseException("info"))
list(self.redis_monitor.plugins_dict.items()
)[1][1]['instance'].handle = MagicMock(
side_effect=BaseException("stop"))
list(self.redis_monitor.plugins_dict.items()
)[2][1]['instance'].handle = MagicMock(
side_effect=BaseException("expire"))
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.scan_iter = MagicMock()
self.redis_monitor._create_lock_object = MagicMock()
# lets just assume the regex worked
self.redis_monitor.redis_conn.scan_iter.return_value = ['somekey1']
# info
try:
plugin = list(self.redis_monitor.plugins_dict.items())[0][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Info not called")
except BaseException as e:
self.assertEqual("info", str(e))
# action
try:
plugin = list(self.redis_monitor.plugins_dict.items())[1][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Stop not called")
except BaseException as e:
self.assertEqual("stop", str(e))
# expire
try:
plugin = list(self.redis_monitor.plugins_dict.items())[2][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Expire not called")
except BaseException as e:
self.assertEqual("expire", str(e))
# test that an exception within a handle method is caught
self.redis_monitor._process_failures = MagicMock()
self.redis_monitor._increment_fail_stat = MagicMock()
try:
list(self.redis_monitor.plugins_dict.items()
)[0][1]['instance'].handle = MagicMock(
side_effect=Exception("normal"))
plugin = list(self.redis_monitor.plugins_dict.items())[0][1]
self.redis_monitor._process_plugin(plugin)
except Exception as e:
self.fail("Normal Exception not handled")
self.assertTrue(self.redis_monitor._increment_fail_stat.called)
self.assertTrue(self.redis_monitor._process_failures.called)
def test_locking_actions(self):
# tests for _process_plugins with locking
self.redis_monitor._load_plugins()
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.scan_iter = MagicMock()
self.redis_monitor.redis_conn.get = MagicMock(return_value=5)
lock = MagicMock()
lock.acquire
lock.acquire = MagicMock(return_value=False)
lock.release = MagicMock()
lock._held = False
self.redis_monitor._create_lock_object = MagicMock(return_value=lock)
self.redis_monitor._increment_fail_stat = MagicMock()
self.redis_monitor._process_failures = MagicMock()
self.redis_monitor._process_key_val = MagicMock()
# lets just assume the regex worked
self.redis_monitor.redis_conn.scan_iter.return_value = ['somekey1']
plugin = {'instance': 'test', 'regex': 'abc123'}
# test didnt acquire lock
self.redis_monitor._process_key_val.assert_not_called()
self.redis_monitor._process_plugin(plugin)
self.redis_monitor._process_key_val.assert_not_called()
lock.release.assert_not_called()
# test got lock
lock.acquire = MagicMock(return_value=True)
lock._held = True
self.redis_monitor._process_plugin(plugin)
self.redis_monitor._process_key_val.assert_called_once_with(
'test', 'somekey1', 5)
# test lock released
lock.release.assert_called_once_with()
# test lock not held not released
lock._held = False
lock.release.reset_mock()
self.redis_monitor._process_plugin(plugin)
lock.release.assert_not_called()
def test_load_stats_plugins(self):
# lets assume we are loading the default plugins
self.redis_monitor._load_plugins()
self.redis_monitor.redis_conn = MagicMock()
# test no rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings['STATS_TIMES'] = []
self.redis_monitor._setup_stats_plugins()
defaults = [
'ExpireMonitor', 'StopMonitor', 'InfoMonitor', 'StatsMonitor',
'ZookeeperMonitor'
]
self.assertEqual(
sorted(self.redis_monitor.stats_dict['plugins'].keys()),
sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key][
'instance'].__class__.__name__
self.assertEqual(
list(self.redis_monitor.stats_dict['plugins']
[plugin_name].keys()), ['lifetime'])
# test good/bad rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings['STATS_TIMES'] = [
'SECONDS_15_MINUTE',
'SECONDS_1_HOUR',
'SECONDS_DUMB',
]
good = [
'lifetime', # for totals, not DUMB
'900',
'3600',
]
self.redis_monitor._setup_stats_plugins()
self.assertEqual(
sorted(self.redis_monitor.stats_dict['plugins'].keys()),
sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key][
'instance'].__class__.__name__
self.assertEqual(
sorted([
str(x) for x in self.redis_monitor.stats_dict['plugins']
[plugin_name].keys()
]), sorted(good))
for plugin_key in self.redis_monitor.stats_dict['plugins']:
k1 = 'stats:redis-monitor:{p}'.format(p=plugin_key)
for time_key in self.redis_monitor.stats_dict['plugins'][
plugin_key]:
if time_key == 0:
self.assertEqual(
self.redis_monitor.stats_dict['plugins'][plugin_key]
[0].key, '{k}:lifetime'.format(k=k1))
else:
self.assertEqual(
self.redis_monitor.stats_dict['plugins'][plugin_key]
[time_key].key, '{k}:{t}'.format(k=k1, t=time_key))
def test_main_loop(self):
self.redis_monitor._load_plugins()
self.redis_monitor._process_plugin = MagicMock(
side_effect=Exception("normal"))
try:
self.redis_monitor._main_loop()
self.fail("_process_plugin not called")
except BaseException as e:
self.assertEqual("normal", str(e))
def test_precondition(self):
self.redis_monitor.stats_dict = {}
instance = MagicMock()
instance.check_precondition = MagicMock(return_value=False)
instance.handle = MagicMock(side_effect=Exception("handler"))
key = 'stuff'
value = 'blah'
# this should not raise an exception
self.redis_monitor._process_key_val(instance, key, value)
# this should
instance.check_precondition = MagicMock(return_value=True)
try:
self.redis_monitor._process_key_val(instance, key, value)
self.fail('handler not called')
except BaseException as e:
self.assertEqual('handler', str(e))
def test_get_fail_key(self):
key = 'test'
result = 'lock:test:failures'
self.assertEqual(self.redis_monitor._get_fail_key(key), result)
def test_process_failures(self):
self.redis_monitor.settings = {
'RETRY_FAILURES': True,
'RETRY_FAILURES_MAX': 3
}
self.redis_monitor._get_fail_key = MagicMock(return_value='the_key')
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.set = MagicMock()
# test not set
self.redis_monitor.redis_conn.get = MagicMock(return_value=None)
self.redis_monitor._process_failures('key1')
self.redis_monitor.redis_conn.set.assert_called_once_with('the_key', 1)
# test set
self.redis_monitor.redis_conn.set.reset_mock()
self.redis_monitor.redis_conn.get = MagicMock(return_value=2)
self.redis_monitor._process_failures('key1')
self.redis_monitor.redis_conn.set.assert_called_once_with('the_key', 3)
# test exceeded
self.redis_monitor.redis_conn.delete = MagicMock()
self.redis_monitor.redis_conn.set.reset_mock()
self.redis_monitor.redis_conn.get = MagicMock(return_value=3)
self.redis_monitor._process_failures('key1')
calls = [call('the_key'), call('key1')]
self.redis_monitor.redis_conn.delete.assert_has_calls(calls)
@mock.patch('socket.gethostname', return_value='host')
@mock.patch('time.time', return_value=5)
def test_report_self(self, h, t):
self.redis_monitor.my_uuid = '1234'
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.set = MagicMock()
self.redis_monitor.redis_conn.expire = MagicMock()
self.redis_monitor._report_self()
self.redis_monitor.redis_conn.set.assert_called_once_with(
'stats:redis-monitor:self:host:1234', 5)
self.redis_monitor.redis_conn.expire.assert_called_once_with(
'stats:redis-monitor:self:host:1234', 120)
class TestRedisMonitor(TestCase):
def setUp(self):
self.redis_monitor = RedisMonitor("settings.py", True)
self.redis_monitor.settings = self.redis_monitor.wrapper.load("settings.py")
self.redis_monitor.logger = MagicMock()
def test_load_plugins(self):
# test loading default plugins
assert_keys = [100, 200, 300, 400]
self.redis_monitor._load_plugins()
self.assertEqual(self.redis_monitor.plugins_dict.keys(), assert_keys)
# test removing a plugin from settings
assert_keys = [100, 300, 400]
self.redis_monitor.settings['PLUGINS'] \
['plugins.stop_monitor.StopMonitor'] = None
self.redis_monitor._load_plugins()
self.assertEqual(self.redis_monitor.plugins_dict.keys(), assert_keys)
self.redis_monitor.settings['PLUGINS'] \
['plugins.stop_monitor.StopMonitor'] = 200
# fail if the class is not found
self.redis_monitor.settings['PLUGINS'] \
['plugins.crazy_class.CrazyHandler'] = 400,
self.assertRaises(ImportError, self.redis_monitor._load_plugins)
del self.redis_monitor.settings['PLUGINS'] \
['plugins.crazy_class.CrazyHandler']
self.redis_monitor.settings['PLUGINS'] = {}
def test_active_plugins(self):
# test that exceptions are caught within each plugin
# assuming now all plugins are loaded
self.redis_monitor._load_plugins()
self.redis_monitor.stats_dict = {}
# BaseExceptions are never raised normally
self.redis_monitor.plugins_dict.items()[0][1]['instance'].handle = MagicMock(side_effect=BaseException("info"))
self.redis_monitor.plugins_dict.items()[1][1]['instance'].handle = MagicMock(side_effect=BaseException("stop"))
self.redis_monitor.plugins_dict.items()[2][1]['instance'].handle = MagicMock(side_effect=BaseException("expire"))
self.redis_monitor.redis_conn = MagicMock()
self.redis_monitor.redis_conn.scan_iter = MagicMock()
# lets just assume the regex worked
self.redis_monitor.redis_conn.scan_iter.return_value = ['somekey1']
# info
try:
plugin = self.redis_monitor.plugins_dict.items()[0][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Info not called")
except BaseException as e:
self.assertEquals("info", e.message)
# action
try:
plugin = self.redis_monitor.plugins_dict.items()[1][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Stop not called")
except BaseException as e:
self.assertEquals("stop", e.message)
# expire
try:
plugin = self.redis_monitor.plugins_dict.items()[2][1]
self.redis_monitor._process_plugin(plugin)
self.fail("Expire not called")
except BaseException as e:
self.assertEquals("expire", e.message)
# test that an exception within a handle method is caught
try:
self.redis_monitor.plugins_dict.items()[0][1]['instance'].handle = MagicMock(side_effect=Exception("normal"))
plugin = self.redis_monitor.plugins_dict.items()[0][1]
self.redis_monitor._process_plugin(plugin)
except Exception as e:
self.fail("Normal Exception not handled")
def test_load_stats_plugins(self):
# lets assume we are loading the default plugins
self.redis_monitor._load_plugins()
self.redis_monitor.redis_conn = MagicMock()
# test no rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings['STATS_TIMES'] = []
self.redis_monitor._setup_stats_plugins()
defaults = [
'ExpireMonitor',
'StopMonitor',
'InfoMonitor',
'StatsMonitor'
]
self.assertEquals(
sorted(self.redis_monitor.stats_dict['plugins'].keys()),
sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key]['instance'].__class__.__name__
self.assertEquals(
self.redis_monitor.stats_dict['plugins'][plugin_name].keys(),
['lifetime'])
# test good/bad rolling stats
self.redis_monitor.stats_dict = {}
self.redis_monitor.settings['STATS_TIMES'] = [
'SECONDS_15_MINUTE',
'SECONDS_1_HOUR',
'SECONDS_DUMB',
]
good = [
'lifetime', # for totals, not DUMB
900,
3600,
]
self.redis_monitor._setup_stats_plugins()
self.assertEquals(
sorted(self.redis_monitor.stats_dict['plugins'].keys()),
sorted(defaults))
for key in self.redis_monitor.plugins_dict:
plugin_name = self.redis_monitor.plugins_dict[key]['instance'].__class__.__name__
self.assertEquals(
sorted(self.redis_monitor.stats_dict['plugins'][plugin_name].keys()),
sorted(good))
for plugin_key in self.redis_monitor.stats_dict['plugins']:
k1 = 'stats:redis-monitor:{p}'.format(p=plugin_key)
for time_key in self.redis_monitor.stats_dict['plugins'][plugin_key]:
if time_key == 0:
self.assertEquals(
self.redis_monitor.stats_dict['plugins'][plugin_key][0].key,
'{k}:lifetime'.format(k=k1)
)
else:
self.assertEquals(
self.redis_monitor.stats_dict['plugins'][plugin_key][time_key].key,
'{k}:{t}'.format(k=k1, t=time_key)
)
def test_main_loop(self):
self.redis_monitor._load_plugins()
self.redis_monitor._process_plugin = MagicMock(side_effect=Exception(
"normal"))
try:
self.redis_monitor._main_loop()
self.fail("_process_plugin not called")
except BaseException as e:
self.assertEquals("normal", e.message)
def test_precondition(self):
self.redis_monitor.stats_dict = {}
instance = MagicMock()
instance.check_precondition = MagicMock(return_value=False)
instance.handle = MagicMock(side_effect=Exception("handler"))
key = 'stuff'
value = 'blah'
# this should not raise an exception
self.redis_monitor._process_key_val(instance, key, value)
# this should
instance.check_precondition = MagicMock(return_value=True)
try:
self.redis_monitor._process_key_val(instance, key, value)
self.fail('handler not called')
except BaseException as e:
self.assertEquals('handler', e.message)